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