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