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