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