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