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