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