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