One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,10)(4,8)(5,7)(6,9)(11,16)(12,15)(13,14)(17,18)(19,23)(20,26)(21,24)(22,25)(27,31)(28,32)(29,30)(33,34)(35,41)(36,39)(37,40)(38,43)(42,48)(44,47)(45,46) involution — undirected(1,3,6,5)(2,7,9,10)(4,11,12,13)(8,14,15,16)(17,19,22,26)(18,23,25,20)(21,27,30,32)(24,31,29,28)(33,35)(34,38)(36,44)(37,43)(39,48)(40,41)(42,46)(45,47)(4,12)(8,15)(11,13)(14,16)(19,26)(20,23)(27,32)(28,31)(33,34,37,40)(35,38,43,41)(36,39,46,45)(42,47,44,48)(1,4,6,12)(2,8,9,15)(3,11,5,13)(7,14,10,16)(17,20)(18,19)(21,28)(22,23)(24,27)(25,26)(29,32)(30,31)(33,34)(35,38)(36,45)(37,40)(39,46)(41,43)(42,48)(44,47)(1,5,6,3)(2,7,9,10)(4,11,12,13)(8,16,15,14)(17,18)(19,23)(20,26)(21,29)(22,25)(24,30)(27,28)(31,32)(33,36,37,46)(34,39,40,45)(35,42,43,44)(38,47,41,48)(1,2)(3,7)(4,8)(5,10)(6,9)(11,14)(12,15)(13,16)(17,21)(18,24)(19,27)(20,28)(22,30)(23,31)(25,29)(26,32)(33,35)(34,38)(36,44)(37,43)(39,48)(40,41)(42,46)(45,47) involution — undirectedA Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.