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