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