One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,8)(3,6,10,14)(4,7,12,16)(9,13,11,15)(17,18,22,29,24,30,23,28)(19,31,33,25,20,35,34,26)(21,27,38,45,40,46,39,44)(32,43,47,41,36,48,37,42)(1,3)(2,6)(4,11)(5,10)(7,15)(8,14)(9,12)(13,16)(17,19)(18,25)(20,24)(21,37)(22,34)(23,33)(26,30)(27,43)(28,35)(29,31)(32,39)(36,38)(40,47)(41,44)(42,45)(46,48) involution — undirected(1,4)(2,7)(3,9)(5,12)(6,13)(8,16)(10,11)(14,15)(17,20,24,19)(18,26,30,25)(21,36,40,32)(22,34,23,33)(27,42,46,41)(28,35,29,31)(37,39,47,38)(43,44,48,45)(4,12)(7,16)(9,11)(13,15)(17,21,23,39,24,40,22,38)(18,27,28,44,30,46,29,45)(19,32,34,37,20,36,33,47)(25,41,31,43,26,42,35,48)(2,8)(3,10)(7,16)(9,11)(17,22,24,23)(18,28,30,29)(19,33,20,34)(21,38,40,39)(25,31,26,35)(27,44,46,45)(32,47,36,37)(41,43,42,48)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.