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