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