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)(20,28)(24,29)(26,32)(30,31)(33,34,38,39)(35,40,37,42)(36,44,45,41)(43,48,46,47)(1,3,8,6)(2,9,7,12)(4,14,5,13)(10,16,11,15)(17,18)(19,23)(20,29)(21,25)(22,27)(24,28)(26,30)(31,32)(34,39)(40,42)(41,44)(47,48)(1,4,8,5)(2,10,7,11)(3,13,6,14)(9,15,12,16)(17,19)(18,22)(20,26)(21,27)(23,25)(24,30)(28,32)(29,31)(33,35,38,37)(34,40,39,42)(36,43,45,46)(41,47,44,48)(1,5,8,4)(2,11,7,10)(3,14,6,13)(9,16,12,15)(17,19)(18,23)(20,26)(21,27)(22,25)(24,31)(28,32)(29,30)(33,36)(34,41)(35,43)(37,46)(38,45)(39,44)(40,47)(42,48)(1,6,8,3)(2,12,7,9)(4,14,5,13)(10,16,11,15)(17,20)(18,24)(19,26)(21,28)(22,30)(23,31)(25,29)(27,32)(33,34)(35,40)(36,41)(37,42)(38,39)(43,47)(44,45)(46,48)(1,7,8,2)(3,12,6,9)(4,11,5,10)(13,16,14,15)(17,18)(19,22)(20,24)(21,25)(23,27)(26,30)(28,29)(31,32)(33,37,38,35)(34,42,39,40)(36,43,45,46)(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.