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