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