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