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