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