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