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