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