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