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