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