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