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