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