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