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