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