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