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)(11,14)(12,13)(15,16)(19,27)(20,29)(23,30)(24,32) involution — undirected(2,6)(7,8)(17,18,21,25)(19,24,27,32)(20,30,29,23)(22,31,28,26)(1,3,5,4)(2,7,6,8)(10,13)(14,16)(17,19)(18,23)(20,22)(21,27)(24,31)(25,30)(26,32)(28,29)(9,11,12,15)(10,14,13,16)(19,20)(22,28)(23,32)(24,30)(26,31)(27,29)(1,4,5,3)(2,8,6,7)(17,20)(18,24)(19,28)(21,29)(22,27)(23,26)(25,32)(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.