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