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