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