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