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