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