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