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