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