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