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