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