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