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