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