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