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