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