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