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