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