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