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