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