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