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