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