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