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