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