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