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