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