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