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