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