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