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