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