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