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