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