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