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