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