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