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