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