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