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)(11,14)(12,13)(15,16)(17,18,23,21)(19,26,29,25)(20,22,31,24)(27,28,30,32)(1,3,5,4)(2,6,8,7)(17,19,23,29)(18,25,21,26)(20,30,31,27)(22,28,24,32)(1,3,5,4)(2,7,8,6)(10,13)(14,16)(17,20)(18,24)(19,26)(21,22)(23,31)(25,29)(27,28)(30,32)(1,4,5,3)(2,6,8,7)(17,21,23,18)(19,27,29,30)(20,22,31,24)(25,32,26,28)(9,11,12,15)(10,14,13,16)(17,22,23,24)(18,20,21,31)(19,28,29,32)(25,30,26,27)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.