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