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)(17,18,22,25)(19,28,32,24)(20,33,36,26)(21,37,23,27)(29,39,31,41)(30,40,34,42)(35,43,38,44)(45,48,46,47)(1,2)(3,6)(4,8)(5,7)(17,19,22,32)(18,24,25,28)(20,34,36,30)(21,31,23,29)(26,42,33,40)(27,41,37,39)(35,46,38,45)(43,48,44,47)(1,3,5,4)(2,6,7,8)(10,13)(14,16)(18,25)(19,29)(21,23)(24,39)(26,33)(28,41)(30,45)(31,32)(34,46)(35,38)(40,47)(42,48)(2,7)(6,8)(10,13)(14,16)(17,20)(18,26)(19,30)(21,38)(22,36)(23,35)(24,40)(25,33)(27,44)(28,42)(29,45)(31,46)(32,34)(37,43)(39,47)(41,48) involution — undirected(1,4,5,3)(2,8,7,6)(9,11,12,15)(10,14,13,16)(17,21,22,23)(18,27,25,37)(19,31,32,29)(20,35,36,38)(24,41,28,39)(26,43,33,44)(30,45,34,46)(40,47,42,48)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.