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