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