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