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