One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,7)(5,10)(8,13)(9,12)(11,15)(14,16)(17,18)(19,23)(20,21)(22,24)(25,29)(26,27)(28,30)(31,32)(33,34)(35,38)(36,41)(37,42)(39,40)(43,48)(44,46)(45,47) involution — undirected(1,2,6,3)(4,9,12,7)(5,8,13,10)(11,15,16,14)(17,19,22,28)(18,23,24,30)(20,26,25,31)(21,27,29,32)(33,35,39,43)(34,38,40,48)(36,44,45,37)(41,46,47,42)(2,3)(7,9)(8,10)(14,15)(18,24)(20,25)(23,30)(26,31)(34,40)(35,43)(36,45)(42,46) involution — undirected(1,3,6,2)(4,9,12,7)(5,10,13,8)(11,15,16,14)(17,20,22,25)(18,21,24,29)(19,26,28,31)(23,27,30,32)(33,36)(34,41)(35,44)(37,43)(38,46)(39,45)(40,47)(42,48)(1,4)(2,7)(3,9)(5,11)(6,12)(8,14)(10,15)(13,16)(17,19)(18,23)(20,26)(21,27)(22,28)(24,30)(25,31)(29,32)(33,37,39,44)(34,42,40,46)(35,45,43,36)(38,47,48,41)(1,5,6,13)(2,8,3,10)(4,11,12,16)(7,14,9,15)(17,21)(18,25)(19,27)(20,24)(22,29)(23,31)(26,30)(28,32)(33,38)(34,43)(35,40)(36,46)(37,41)(39,48)(42,45)(44,47)A 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.