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