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