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