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