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