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