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