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