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