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