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