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