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