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