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