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