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