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