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