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