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