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