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