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