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