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