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