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