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