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