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