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