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