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