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