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