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)(13,16)(17,18,22,23,21,26,20,25)(19,27,29,32,28,24,30,31)(9,10)(11,16)(12,14)(13,15)(18,23)(19,28)(20,22)(24,32)(25,26)(27,31) involution — undirected(1,3,5,4)(2,6,7,8)(9,11,12,15)(10,13,14,16)(17,19,21,28)(18,24,26,27)(20,30,22,29)(23,31,25,32)(10,14)(13,16)(17,20,21,22)(18,25,26,23)(19,29,28,30)(24,31,27,32)(1,4,5,3)(2,6,7,8)(18,26)(23,25)(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.