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