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