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