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