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