One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,7)(4,6)(5,8)(9,10,12,14)(11,15,16,13)(17,18,24,27)(19,28,23,22)(20,25,32,29)(21,30,31,26)(1,3,6,5)(2,7,4,8)(9,11,12,16)(10,13,14,15)(17,19,24,23)(18,22,27,28)(20,30,32,26)(21,29,31,25)(1,4,6,2)(3,7,5,8)(17,20)(18,25)(19,26)(21,28)(22,31)(23,30)(24,32)(27,29)(1,5,6,3)(2,7,4,8)(17,21,24,31)(18,26,27,30)(19,29,23,25)(20,28,32,22)(17,22,24,28)(18,19,27,23)(20,31,32,21)(25,26,29,30)(17,23,24,19)(18,22,27,28)(20,30,32,26)(21,25,31,29)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.