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)(19,24)(20,22)(21,26)(23,25)(27,31)(28,29)(30,32)(1,2)(3,6)(4,7)(5,8)(9,11,13,16)(10,14,12,15)(17,19,23,20)(18,24,25,22)(21,28,30,27)(26,29,32,31)(1,2)(3,6)(4,7)(5,8)(18,25)(19,20)(26,32)(27,28) involution — undirected(17,20,23,19)(18,22,25,24)(21,28,30,27)(26,29,32,31)(1,3,5,4)(2,6,8,7)(17,21,23,30)(18,26,25,32)(19,27,20,28)(22,29,24,31)(1,4,5,3)(2,7,8,6)(9,12,13,10)(11,15,16,14)(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.