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