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