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