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