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