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