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