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