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