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