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