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