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