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