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