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