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