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