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