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