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